FUEL SYSTEM
CS-600
29
4-6 Adjusting carburettor
4-6-1 General adjustment rules
A. Before adjustment, check the following items.
1. The correct spark plug must be clean and properly gapped.
2. The air
fi
lter element must be clean and properly installed.
3. The muf
fl
er exhaust port must be clear of carbon.
4. The fuel lines, tank vent and fuel
fi
lter are in good condition and clear of debris.
5. The fuel is fresh ( > 89 octane : RON ) and properly mixed at 50 : 1 with “ISO L-EGD” or “JASO FC/
FD” 2-stroke oil.
6. 50 cm bar and chain must be installed, and properly tensioned.
B. Adjustment with limiter caps on carburettor.
Set L and H mixture needles fully anticlockwise. Start and run engine for two minutes alternating engine
speed between WOT for 5 seconds and idle for 5 seconds. Adjust Throttle adjust screw to 2,800 +/- 150
r/min. Adjust H mixture needle to 12,500 +/- 300 r/min. If engine does not run correctly after this adjust-
ment, proceed to the next step 2-2.
IMPORTANT : After adjusting carburettor according to the steps 2-2 and 2-3, the limiter cap(s)
must be installed on L and H mixture needle(s) to comply with Emission Directive.
4-6-2 Initial setting Throttle adjust screw, L mixture needle and H mixture needle
Tools Required : Small screwdriver with 2.5 mm
blade, Tachometer PET-304 P/N G310-000050,
limiter cap removal tool with 2.5 mm left-hand
thread P/N 91019. Parts Required : (2) limiter caps
P/N P003-000010.
1. Turn the L and H mixture needles anticlockwise
to rich side stop to align limiter cap tab (A) with lo-
cating slot (B), using 2.5 mm blade screwdriver.
NOTE :
If cap tabs (A) misalign with locating slots
(B), the cap cannot be removed and the centre
hole threads will strip. If centre hole threads strip,
use 3 mm diameter thread wood screw to remove
the limiter cap.
B
A
A
B
